Stichting Mathematisch Centrum
Stichting Mathematisch Centrum. Toegepaste Wiskunde

Veling, E. J. M. (1981). Optimal lower bounds for the spectrum of a second order linear differential equation with a p-integrable coefficient : (preprint). In Stichting Mathematisch Centrum. Toegepaste Wiskunde (TW 218/81). Stichting Mathematisch Centrum.